The organism that grows anaerobically in dead or damaged tissue and produces dense colonies that are the color and size of sulfur particles is
A. Escherichia coli.
B. Staphylococcus aureus.
C. Actinomyces israelii.
D. Pseudomonas aeruginosa.
C.
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If the actual results most closely resembled those in part (A) in the figure above, then a further question arising from these data is:
"Do the Dawsonia rhizoids have to be alive to reduce soil nitrogen loss, or do dead rhizoids have the same effect?" Arrange the following steps in the correct sequence to test this hypothesis. 1. Add metabolic poison to the soil of the experimental plot of mosses. 2. Apply water equally to the experimental and control plots. 3. Measure initial soil nitrogen contents of control and experimental plots. 4. Determine nitrogen loss from soil of control and experimental plots. 5. Establish two identical plots of Dawsonia mosses; one as a control, the other as the experimental treatment. A) 5 ? 1 ? 3 ? 2 ? 4 B) 5 ? 2 ? 3 ?? 1 ? 4 C) 5 ? 3 ? 1 ?? 2 ? 4 D) 4 ? 5 ? 1 ? 3 ?? 2 E) 5 ? 3 ? 2 ?? 1 ? 4
Ribbon worms belong to the phylum:
a. Nemertea. b. Platyhelminthes. c. Arthropoda. d. Ctenophora. e. Cnidaria.
Any light-driven reaction that attaches phosphate to a
molecule is called __________. Fill in the blank(s) with the appropriate word(s).
Amino acids are metabolized by reactions in which the amino group (2nh2) is first removed ___________
Fill in the blank(s) with the appropriate word(s).